判断数组是否为空 再去遍历 ,如果数组为空的话, 怎么还报空指针啊?
6条回答 默认 最新
- 嘉嗳玲 2016-08-30 08:25关注
我瞎写个
String [] keys = {"key1","key2","key3","key4","key5"};
String [] values = {"v1","v2","v3","v4",""};
Map m = new HashMap();
for(int i=0;i<5;i++){
m.put(keys[i],values[i]);
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